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Advanced PFAS Removal From Impacted Water Streams Using Colloidal Gas Aphrons

Award Number: R43ES037583
ORGANIZATION: NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES
OPDIV: NIH
AWARD CLASS: DISCRETIONARY
AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)
PERIOD OF PERFORMANCE START DATE: 08/01/2026
PERIOD OF PERFORMANCE END DATE: 07/31/2027

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Advanced PFAS Removal From Impacted Water Streams Using Colloidal Gas Aphrons - PROJECT SUMMARY/ABSTRACT (Resubmission – Revised) This project aims to develop and validate an innovative water treatment technology using Colloidal Gas Aphrons (CGAs) for comprehensive removal of both long-chain and ultra/short- chain per- and polyfluoroalkyl substances (PFAS) from contaminated water. PFAS are persistent environmental pollutants linked to significant health risks, and current technologies often fail to adequately capture short-chain and precursor compounds, leaving a critical gap in remediation strategies. Our technology uses positively charged CGAs—microscale structures composed of air, water, and surfactant—that remove anionic PFAS via electrostatic attraction. In contrast to conventional approaches like granular activated carbon or foam fractionation, CGAs operate under atmospheric pressure, offer superior short-chain PFAS removal, and naturally concentrate PFAS into small liquid volumes for downstream destruction. This resubmission incorporates new data and revisions that directly address reviewer concerns. Specifically, we have: • Demonstrated >99% removal of key PFAS (including PFOS, PFOA, PFHxS) in a three- stage semi-batch system. • Shown that residual surfactant levels are <0.1 ppm—well below regulatory thresholds for human consumption. • Confirmed scalability using commercial aphron generation equipment operating at atmospheric pressure. • Clarified intellectual property protections under U.S. Patent No. 11,679,999 B2, with broad claims covering surfactant-based PFAS removal. Research objectives include: 1. Optimization of aphron generation and separation, including multi-stage performance enhancement and continuous flow reactor development (1–2 gpm scale); 2. Performance evaluation across diverse matrices, including high-salinity reverse osmosis concentrate and low-concentration drinking water; 3. Concentration process development for producing high-strength PFAS waste streams suitable for destruction technologies. This work advances a novel, scalable, and cost-effective PFAS treatment platform. Successful Phase I outcomes will position this technology for full-scale deployment, reducing PFAS exposure and enhancing public access to safe, clean drinking water. 11


Issue Date FY	Funding FY	Legal Entity Name	Legal Entity Address	Legal Entity City	Legal Entity State	Legal Entity Zip Code	Legal Entity COUNTY	Legal Entity COUNTRY	Assistance Listing	Award Code	Budget Year	Action Date	Action Type	Action Amount

Issue Date FY: 2026 ( Subtotal = $180,843 )
2026	2026	GSI ENVIRONMENTAL INC.	2211 NORFOLK ST	HOUSTON	TX	77098	HARRIS	USA	NIEHS Superfund Hazardous Substances_Basic Research and Education	000	1	7/30/2026	NEW	$180,843
														Subtotal = $180,843

Grand Total All Awards = $180,843

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Advanced PFAS Removal From Impacted Water Streams Using Colloidal Gas Aphrons

Award Number: R43ES037583

ORGANIZATION: NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES

OPDIV: NIH

AWARD CLASS: DISCRETIONARY

AWARD ACTIVITY TYPE: SCIENTIFIC/HEALTH RESEARCH (INCLUDES SURVEYS)

PERIOD OF PERFORMANCE START DATE: 08/01/2026

PERIOD OF PERFORMANCE END DATE: 07/31/2027

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